Loose-leaf binder



Feb. 23, 1943. w. PITT 2,312,190

LOOSE LEAF BINDER Filed A ri 1 26, 1941 k 5 /Z/ 1 [9 Z5 I v INVENTOR.

I WMa/m PM Patented Feb. 23, 1943 LOOSE-LEAF BINDER William Pitt, Union, N. J., assignor to Wilson- Jones Company, Chicago, 111., a corporation of Massachusetts Application iApril 26, 1941, Serial No. 390,517

1 Claim.

This invention relates to a loose leaf binder and more particularly to a multi-ply panel adapted for use as a cover member.

It is an object of my invention to provide a laminated panel having its outer surfaces of metal and being of less weight than a metal panel of similar size. It is a further object of my invention to provide a laminated panel that may be sterilized by immersion in sterilizing solution at high temperature without any deleterious effect. Other objects of my invention will become apparent upon reading the following description, taken in conjunction with the accompanying drawing, in which:

Figure 1 is a perspective view of a loose leaf binder, or sheet holder, embodying my invention;

Figure 2 is a cross sectional view taken along the line IIII of Figure 1; and

Figure 3 is a cross sectional view taken along the line III-III of Figure 1.

I have illustrated my invention in connection with a sheet holder of the type generally used in hospitals because it has particular advantages in this connection, due to its ability to withstand sterilization, but it will be understood that the device is not limited to this specific use. The laminated panel may be used on any type of loose leaf binder as a substitute for any solid metal covor members.

In the drawing, the reference numeral 2 indicates a hinge structure comprising a pair of clamping plates 3 and 4 joined by means of a pintle 5 and provided with a plurality of coiled springs 6 urging the clamping members 3 and 4 together. The ends of the pintle 5 are preferably provided with a pair of rubber bumpers I. A metal strip 8 is hinged to the leaf 3, as indicated at 9, so that the top cover may be raised to allow inspection of the sheets without releasing the same from the clamping members. The cover member I0 comprises a pair of thin metal sheets II and I2 adhered by means of any suitable adhesive, to opposite surfaces of a filler sheet I3. The filler may be formed of any suitable fibrous material or may be any moulded plastic compound. The metal sheets II and I2 are co-extensive with each other and project beyond each edge of the filler sheet I3.

The projecting edges of the metal sheets I I and I2 are crimped together as indicated at I4. A U-shaped metal strip I5 is applied around all of the edges of the cover member ID to seal the edges of the sheets IIand I2. A suitable adhesive is preferably applied between the inner surfaces of the member I5 and the portion I4 of the cover member to increase the security with which the strip I5 is held in place. The strip I5 is of such thickness as to make itsouter surfaces flush with the outer surfaces of the metal sheets II and I2. The cover member I0 is secured to the metal strip 8 by means of a plurality of rivets I6, but is obvious and it may be secured thereto by any other suitable means, such as welding. A bottom cover member I'I, similar in construction to the cover member I0, is secured to the clamping strip 4 in any suitable manner.

While I have described a preferred embodiment of my invention in detail, it will be understood that the description thereof is illustrative, rather than restrictive, as many details may be modified or changed without departing from the spirit or scope of my invention. Accordingly, I do not desire to be restricted to the exact construction described, except as limited by the appended claim.

I claim:

In a loose leaf binder, a cover member comprising a filler and a pair of sheets positioned on opposite faces of said filler, said sheets projecting beyond the edges of said filler, and. a continuous U-shaped clamping strip embracing all four edges of said filler.

WILLIAM PITTv 

